'Stomach' is Greek for 'mouth' — from 'stoma.' It originally meant throat, then migrated downward.
The internal organ in which the first part of digestion occurs, or more loosely, the belly or abdomen.
From Old French 'estomac,' from Latin 'stomachus,' from Greek 'stomachos' (throat, gullet, the opening leading to the stomach), from 'stoma' (mouth, opening, orifice). Greek 'stoma' derives from PIE *stom-en- (mouth, opening). The anatomical referent shifted downward through the language chain: in Greek 'stomachos' was the esophagus and the entrance to the stomach; in Latin 'stomachus' wavered between the organ itself and its entrance; in French and English the word settled on the digestive organ. The Greek root 'stoma' survives in English scientific vocabulary: 'stomatology' (dentistry), 'stoma' (a surgically created opening), and 'anastomosis' (the surgical joining